20:
38:
178:
1279:
142:
in their quest for metal ores. An experienced prospector could read the clues in the structure of the gossans to determine the type of mineralization likely to be found below the
111:
and primary ore minerals. Frequently, gossan appears as a red "stain" against the background rock and soil, due to the abundance of oxidized iron; the gossan may be a
1010:
158:
appears to come from
Cornish miner's slang. The terms "iron cap" and "iron hat", common in America, are direct translations from the German "
95:(which are quartz-lined cavities retaining the shape of the dissolved ore minerals). In other cases, quartz and iron oxides,
1320:
282:
19:
1349:
37:
255:
229:
119:-resistant quartz and iron oxides. Although most gossans are red, orange, or yellow, black gossans from
1339:
1313:
335:
315:
275:
760:
725:
203:
138:
In the 19th and 20th centuries, gossans were important guides to buried ore deposits used by
8:
1354:
1344:
1306:
556:
268:
511:
251:
207:
1208:
920:
707:
576:
1020:
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633:
183:
1294:
1290:
1286:
1213:
1055:
648:
571:
72:
1333:
1258:
1173:
1138:
985:
546:
451:
1183:
1163:
1035:
682:
660:
601:
501:
446:
431:
297:
1072:
963:
943:
933:
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810:
735:
581:
516:
486:
441:
399:
372:
367:
357:
320:
139:
132:
211:
200:
Getting Gold: A Practical
Treatise for Prospectors, Miners, and Students
1238:
1223:
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1103:
1088:
1005:
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938:
928:
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835:
815:
770:
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613:
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566:
536:
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436:
345:
124:
112:
84:
64:
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1243:
1233:
1218:
1188:
1168:
1153:
1148:
1113:
1108:
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1060:
1025:
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980:
958:
900:
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875:
865:
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830:
805:
800:
795:
785:
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750:
715:
628:
596:
541:
531:
506:
481:
476:
416:
377:
340:
128:
120:
42:
27:
1228:
1203:
1128:
1098:
1093:
1015:
1000:
968:
948:
845:
820:
697:
672:
665:
643:
638:
591:
526:
411:
362:
352:
310:
104:
100:
96:
60:
1248:
1178:
1143:
1118:
1050:
885:
825:
765:
730:
623:
551:
466:
426:
394:
389:
305:
260:
135:
form at the oxidized portion of manganese-rich mineral deposits.
116:
92:
31:
23:
1158:
1030:
990:
953:
855:
720:
618:
608:
561:
521:
491:
421:
406:
384:
330:
325:
108:
88:
1278:
1123:
1045:
1040:
905:
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790:
745:
740:
67:
or decomposed rock, usually the upper and exposed part of an
895:
840:
755:
687:
68:
173:
1331:
246:Guilbert, John M. and Charles F. Park Jr (1986)
16:Intensely oxidized, weathered or decomposed rock
1314:
276:
1321:
1307:
283:
269:
202:Lippincott, Philadelphia, Pennsylvania,
166:", which term was also used in America.
36:
18:
107:, exist as pseudomorphs, replacing the
1332:
115:positive area due to the abundance of
264:
223:
221:
219:
198:Johnson, Joseph Colin Francis (1897)
1273:
13:
290:
216:
14:
1366:
230:Century Dictionary and Cyclopedia
1277:
176:
192:
1:
240:
1293:. You can help Knowledge by
248:The Geology of Ore Deposits,
7:
250:W. H. Freeman, pp 799–830,
10:
1371:
1272:
1350:Cornish words and phrases
1081:
919:
706:
296:
41:Malachite on gossan from
169:
336:Basaltic trachyandesite
316:Alkali feldspar granite
149:
91:, often in the form of
1289:-related article is a
45:
34:
726:Banded iron formation
40:
22:
83:all that remains is
233:Vol. III, page 2581
71:deposit or mineral
1082:Specific varieties
46:
35:
1302:
1301:
1267:
1266:
512:Nepheline syenite
131:, and especially
1362:
1340:Economic geology
1323:
1316:
1309:
1281:
1274:
1209:Rapakivi granite
921:Metamorphic rock
708:Sedimentary rock
577:Quartz monzonite
285:
278:
271:
262:
261:
234:
225:
214:
196:
186:
181:
180:
179:
1370:
1369:
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1361:
1360:
1359:
1330:
1329:
1328:
1327:
1270:
1268:
1263:
1077:
1021:Pseudotachylite
915:
702:
634:Tephriphonolite
292:
289:
243:
238:
237:
226:
217:
197:
193:
184:Cornwall portal
182:
177:
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172:
152:
123:oxides such as
59:) is intensely
30:on gossan from
17:
12:
11:
5:
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1318:
1311:
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1261:
1256:
1251:
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1241:
1236:
1231:
1226:
1221:
1216:
1214:Rhomb porphyry
1211:
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1056:Talc carbonate
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1038:
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1028:
1023:
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923:
917:
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828:
823:
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738:
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723:
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704:
703:
701:
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695:
690:
685:
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675:
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669:
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649:Trachyandesite
646:
641:
636:
631:
626:
621:
616:
611:
606:
605:
604:
599:
589:
584:
579:
574:
572:Quartz diorite
569:
564:
559:
554:
549:
544:
539:
534:
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504:
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494:
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291:Types of rocks
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15:
9:
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3:
2:
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1200:
1197:
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1192:
1190:
1187:
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1177:
1175:
1174:Litchfieldite
1172:
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1165:
1162:
1160:
1157:
1155:
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1147:
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1142:
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1139:Hyaloclastite
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1127:
1125:
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1120:
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986:Litchfieldite
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979:
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547:Phonotephrite
545:
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458:
455:
453:
452:Hyaloclastite
450:
448:
445:
443:
440:
438:
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430:
428:
425:
423:
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418:
415:
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257:
256:0-7167-1456-6
253:
249:
245:
244:
232:
231:
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222:
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213:
209:
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161:
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147:
145:
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136:
134:
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118:
114:
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106:
102:
98:
94:
90:
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82:
78:
74:
70:
66:
62:
58:
54:
50:
44:
39:
33:
29:
25:
21:
1295:expanding it
1284:
1269:
1184:Luxullianite
1164:Lapis lazuli
1133:
1109:Blue Granite
1036:Serpentinite
1011:Metapsammite
761:Conglomerate
683:Trondhjemite
661:Trachybasalt
602:Pantellerite
502:Monzogranite
447:Hornblendite
432:Granodiorite
298:Igneous rock
247:
228:
199:
194:
163:
160:Eiserner Hut
159:
155:
153:
143:
137:
80:
76:
56:
53:eiserner hut
52:
48:
47:
1073:Whiteschist
964:Greenschist
944:Cataclasite
934:Amphibolite
861:Phosphorite
811:Itacolumite
736:Calcarenite
582:Quartzolite
517:Nephelinite
487:Lamprophyre
442:Harzburgite
400:Napoleonite
373:Charnockite
368:Carbonatite
358:Blairmorite
321:Anorthosite
140:prospectors
133:psilomelane
113:topographic
85:iron oxides
1355:Rock stubs
1345:Mineralogy
1334:Categories
1239:Teschenite
1224:Shonkinite
1199:Pietersite
1194:Novaculite
1104:Borolanite
1089:Adamellite
1006:Metapelite
974:Calcflinta
939:Blueschist
929:Anthracite
911:Wackestone
891:Travertine
836:Lumachelle
816:Jaspillite
771:Diamictite
693:Websterite
678:Troctolite
654:Benmoreite
614:Shonkinite
587:Rhyodacite
567:Pyroxenite
537:Peridotite
497:Lherzolite
472:Kimberlite
462:Ignimbrite
457:Icelandite
437:Granophyre
346:Shoshonite
241:References
125:pyrolusite
79:gossan or
1254:Variolite
1244:Theralite
1234:Tachylite
1219:Rodingite
1189:Mangerite
1169:Larvikite
1154:Jasperoid
1149:Jadeitite
1114:Epidosite
1068:Tectonite
1061:Soapstone
1026:Quartzite
996:Migmatite
981:Itabirite
959:Granulite
901:Turbidite
881:Sylvinite
876:Siltstone
866:Sandstone
851:Oil shale
831:Limestone
806:Gritstone
801:Greywacke
796:Geyserite
786:Evaporite
776:Diatomite
751:Claystone
716:Argillite
629:Tachylyte
597:Comendite
542:Phonolite
532:Pegmatite
507:Monzonite
482:Lamproite
477:Komatiite
417:Foidolite
378:Enderbite
341:Mugearite
227:"gossan"
154:The name
129:manganite
121:manganese
75:. In the
65:weathered
43:Australia
28:malachite
1229:Taconite
1204:Pyrolite
1129:Ganister
1099:Aphanite
1094:Appinite
1016:Phyllite
1001:Mylonite
969:Hornfels
949:Eclogite
846:Mudstone
821:Laterite
781:Dolomite
698:Wehrlite
673:Trachyte
666:Hawaiite
644:Tonalite
639:Tephrite
592:Rhyolite
557:Porphyry
527:Obsidian
412:Essexite
363:Boninite
353:Basanite
311:Andesite
164:Eisenhut
144:iron cap
105:jarosite
101:goethite
97:limonite
93:boxworks
81:iron cap
61:oxidized
57:eisenhut
1249:Unakite
1179:Llanite
1144:Ijolite
1119:Felsite
1051:Suevite
886:Tillite
826:Lignite
766:Coquina
731:Breccia
624:Syenite
552:Picrite
467:Ijolite
427:Granite
395:Diorite
390:Diabase
306:Adakite
212:5164023
204:page 15
117:erosion
77:classic
32:Arizona
24:Azurite
1159:Kenyte
1134:Gossan
1031:Schist
991:Marble
954:Gneiss
856:Oolite
721:Arkose
619:Sovite
609:Scoria
562:Pumice
522:Norite
492:Latite
422:Gabbro
407:Dunite
385:Dacite
331:Basalt
326:Aplite
254:
210:
162:" or "
156:gossan
109:pyrite
103:, and
89:quartz
49:Gossan
1285:This
1124:Flint
1046:Slate
1041:Skarn
906:Varve
871:Shale
791:Flint
746:Chert
741:Chalk
170:Notes
1291:stub
1287:rock
896:Tufa
841:Marl
756:Coal
688:Tuff
252:ISBN
208:OCLC
150:Name
87:and
73:vein
1259:Wad
69:ore
55:or
1336::
218:^
206:,
146:.
127:,
99:,
63:,
1322:e
1315:t
1308:v
1297:.
284:e
277:t
270:v
51:(
26:-
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